It might seem like an obvious place to start, but ensuring you have a clean space to work with is critical, then you can start by removing weeds. Whether it is by hand or with a glyphosate herbicide spray, such as Roundup, ensuring your surface is weed-free will go a long way to ensuring that your instant turf is laid on a happy and healthy foundation!
If couch grass or kikuyu grass is present in the area, spray it with a group B herbicide such as Brushoff. Wait approximately 7-10 days until the weeds die and respray residual weeds as necessary. Remove all debris including any small rocks or twigs. If you’re removing an existing lawn and replacing it with a new variety, consider hiring a turf cutter for large areas. Alternatively, use a sharp spade to remove any traces of existing grass.